github
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
@@ -101,9 +101,11 @@ jobs:
       secureFile: certificate.pfx
 
   - script: $(vsixsigntool_exe.secureFilePath) sign /f $(certificate_pfx.secureFilePath) /p "$(certificate_password)" /sha1 9c5a6d389e1454f2ed9ee9419cdf743689709f9c /fd sha256 /tr http://timestamp.digicert.com /td sha256 $(ArtifactDirectory)\GitHub.VisualStudio.vsix
+    condition: not(eq(variables['Build.Reason'], 'PullRequest'))
     displayName: Sign the GitHub for Visual Studio VSIX
 
   - script: $(vsixsigntool_exe.secureFilePath) sign /f $(certificate_pfx.secureFilePath) /p "$(certificate_password)" /sha1 9c5a6d389e1454f2ed9ee9419cdf743689709f9c /fd sha256 /tr http://timestamp.digicert.com /td sha256 $(ArtifactDirectory)\GitHub.VisualStudio.16.vsix
+    condition: not(eq(variables['Build.Reason'], 'PullRequest'))
     displayName: Sign the GitHub Essentials VSIX
 
   - task: PublishBuildArtifacts@1

diff --git a/lib/16.0/Microsoft.TeamFoundation.Client.dll b/lib/16.0/Microsoft.TeamFoundation.Client.dll
diff --git a/lib/16.0/Microsoft.TeamFoundation.Common.dll b/lib/16.0/Microsoft.TeamFoundation.Common.dll
diff --git a/lib/16.0/Microsoft.TeamFoundation.Controls.dll b/lib/16.0/Microsoft.TeamFoundation.Controls.dll
diff --git a/lib/16.0/Microsoft.TeamFoundation.Git.Client.dll b/lib/16.0/Microsoft.TeamFoundation.Git.Client.dll
diff --git a/lib/16.0/Microsoft.TeamFoundation.Git.Controls.dll b/lib/16.0/Microsoft.TeamFoundation.Git.Controls.dll
diff --git a/lib/16.0/Microsoft.TeamFoundation.Git.Provider.dll b/lib/16.0/Microsoft.TeamFoundation.Git.Provider.dll
diff --git a/src/GitHub.App/Services/PullRequestEditorService.cs b/src/GitHub.App/Services/PullRequestEditorService.cs
@@ -219,10 +219,10 @@ public async Task<IDifferenceViewer> OpenDiff(IPullRequestSession session, strin
                     frame = VisualStudio.Services.DifferenceService.OpenComparisonWindow2(
                         leftFile,
                         rightFile,
-                        caption,
-                        tooltip,
-                        leftLabel,
-                        rightLabel,
+                        SanitizeForDisplay(caption),
+                        SanitizeForDisplay(tooltip),
+                        SanitizeForDisplay(leftLabel),
+                        SanitizeForDisplay(rightLabel),
                         string.Empty,
                         string.Empty,
                         (uint)options);
@@ -284,6 +284,13 @@ public async Task<IDifferenceViewer> OpenDiff(IPullRequestSession session, strin
             }
         }
 
+        private static string SanitizeForDisplay(string caption)
+        {
+            // The diff window passes captions and tooltips through string.Format, with {0} and {1} being the left and right file respectively, but we already
+            // nicely format the file names with extra info we know, so we have to escape braces to prevent unwanted formatting, or invalid format errors.
+            return caption.Replace("{", "{{").Replace("}", "}}");
+        }
+
         /// <inheritdoc/>
         public Task<IDifferenceViewer> OpenDiff(
             IPullRequestSession session,

diff --git a/src/GitHub.TeamFoundation.14/Services/TeamExplorerServices.cs b/src/GitHub.TeamFoundation.14/Services/TeamExplorerServices.cs
@@ -9,6 +9,7 @@
 using EnvDTE;
 using GitHub.VisualStudio.TeamExplorer.Sync;
 using Microsoft.TeamFoundation.Controls;
+using Microsoft.VisualStudio.TeamFoundation.Git.Extensibility;
 using ReactiveUI;
 
 namespace GitHub.Services
@@ -66,12 +67,36 @@ public void ShowHomePage()
 
         public void ShowPublishSection()
         {
+#if TEAMEXPLORER16
+            // Only call InitializeOrPushRepositoryToGitService when IGitActionsExt2 exists
+            if (FindIGitActionsExt2() is object)
+            {
+                InitializeOrPushRepositoryToGitService();
+                return;
+            }
+#endif
+
             var te = serviceProvider.TryGetService<ITeamExplorer>();
             var page = te.NavigateToPage(new Guid(TeamExplorerPageIds.GitCommits), null);
             var publish = page?.GetSection(new Guid(GitHubPublishSection.GitHubPublishSectionId)) as GitHubPublishSection;
             publish?.Connect();
         }
 
+#if TEAMEXPLORER16
+        private static Type FindIGitActionsExt2()
+        {
+            Type type = typeof(IGitActionsExt);
+            string name = $"{type.FullName}2";
+            return type.Assembly.GetType(name, false);
+        }
+
+        private void InitializeOrPushRepositoryToGitService()
+        {
+            IGitActionsExt2 gitActionsExt = serviceProvider.TryGetService<IGitActionsExt2>();
+            gitActionsExt?.InitializeOrPushRepositoryToGitService();
+        }
+#endif
+
         public async Task ShowRepositorySettingsRemotesAsync()
         {
             var te = serviceProvider.TryGetService<ITeamExplorer>();

diff --git a/submodules/octokit.graphql.net b/submodules/octokit.graphql.net